Grain-drill



mmmimwm A. M. THREEWITS.

GRAIN DFHLL.

APPLICATION men JUNE 28. 1919 nzuzwen MAY 19. 1920.

@moewtoz @lttummmam UNITED STATESPATENT OFFICE.

ALVIN M. THREEWITS, 0F CENTERVILLE, INDIANA.

caAI NmnILL.

Application filed June 28,

To all whom it may concern:

c it known that I, ALVIN M. Tnnnnwrrs, a citizen of the United States, residing at Centerville, in the county of Wayne and State of Indiana, have invented a new and useful Grain-Drill, of which the following is a specification.

The present invention relates to grain drills or planters, the main object being to provide a planter or drill which will drop seeds in rows and bury the same in the ground.

A further object is drill which embodies-a plurality of hoppers for containing seeds of different kinds, and means for burying the seeds at various depths, it being necessary to plant some seeds deeper than others.

n additional objectof to provide agrain drill having the above characteristics which issimple in construction, which consists of few parts, and which may be readily assembled and disassembled, and which can be manufactured and placed on the market at a minimum cost.

With the above and other objects and adto provide a grain vantages in mind, the invention consists of.

the combinations of elements, constructions and arrangements, operatlons and general assemblage, the inventive features of which will be hereinafter specifically referred to and recited. in the appended claims, one embodiment of the invention being illustrated in the accompanyingdrawing wherein Figure 1 is a view partly in vertical cross section and partly in elevation of my improved grain drill;

Figs. 2, 3 and 4 are detail views of elements used in carrying out the invention.

vertical sectlonal view taken.

Fig. 5 is a on line 5-5 of Fig. 1;

Fig. 6 is a fragmentary view of one of and operating mechanism Fig. 7 is a horizontal transverse sectional view taken through the boot;

lF'ig. 8 is a transverse section through the Fig. 9 is a plan view of the drill. Referring to the drawing by numerals'of reference, the numeral 5 deslgnates a hopper which is provided with a centralwall 6 to aflord the main chambers 7 and 8. IAttached to the rear wall of the chamber 8 is.

a small seed chamber 9 from which extends, a spout 10 that extends vertically. The hop Specification of Letters Patent. 1919, Serial No. 307.275. Renewed May 19,

the invention is,

Patented July 6.1920.

1920. Serial No. 3%,643.

per 5 is mounted upon wheels (not shown to be'drawn over the field in any desirable manner.

A vertical tube or spout 12 extends from the lower end of the seed chamber. 8 while a similar spout extends from the. fertilizer chamber 7, the fertilizer chamber having a slide valve 13 mounted therein while a rotary roller lflis mounted in the bottom of the seed compartment and is provided with seed receiving tated, pick the seeds up and drop the same in the spout 12." v A )penings 16 are provided in the bottom of the hopper 9 and guides 16' are disposed atthe longitudinal edges of in which are mounted the slide valves. Legs 18 are pivoted adjacent to "thes'evol'pena. ings and are pivotally connected, at .one end with the valves 17 and'an-operatingj-barLlQ at'their opposite ends. it graduated scale 20 is provided over which the combined in dicator and operating handle 21 moves to indicate to what degree the slide valves are open. The seed dropping tubes 12 depend from the hopper .9 and are arranged directly below the openings in the bottom ofthe same. Sup

)orted below the main hopper is' a plum ity of drill boots 22, one

boot for each tube or. spout 12 and 13. The" of these boots curved toward each other, one being conside walls are pointed and grooves 15, which; when rothese openings a siderably shorter than the other. The fronts are mounted the rotatable furrowing disks,

24 which are disposed centrally of the disks. Each boot is equipped witha central partition 21' inthe upper end thereof and-this partition is arranged vertically directly above the furrow disk whereby a seed tube 12 is disposed upon one side-of the partition and the fertilizer tube upon the other side, thus preventin theseeds and fertilizer from mixing in the boots, the seeds and spaced ears L being discharged by way of the longer curved wall *ofthc boot and below the sur faceof the ground while the fertilizer is dropped abov the same from the sh wall of the boot, i l

Pivoted to :each' of'the boots 22 is-a furrow covering shoe 25 which drags over the contact with the 1'10 furrows and is held in I ground through the medium of the expansi ble spring 26. i

Fromthe disclosure it will be apparent that as the drill is moved over thefield the seedswill be dropped in rows or furrows made by the disks 2d and covered by shoes 25. It will also be seen that by moving the member 21 the valve slides will be opened and register the 'degree of the openboot and disposed between said discharge tubes, and a disk rotatably mounted in said boot directly below said partition, the disk being projected through the boot for dividing the same into two independent passage ways.

2. Ina seed drill, a hopper, discharge tubes depending from the bottom of the hop per, a drill boot receiving the ends of the tubes, the'side walls of the drill boot being longitudinally curved and one wall project- 'ingbelow the other, a furrow forming disk rotatable in the side walls of the boot and dividing the same, and a trailing shoe for covering the furrows mounted rearwardly of the boot.

3. In a grain drill, a hopper having a pair of compartments, a tube depending from each of the compartments a drill boot receiving the ends of the tubes and being provided with a slot in its front wall, the

side walls of said boot being curved toward eachother, one wall projecting below the other, a furrow forming disk mounted in the drill and movable through the slot, the periphery of the disk beingfiush with the end of the longer wall whereby the seed being discharged alongthe longer wall will be deposited at-the bottom of tlle furrow, the shorterwall causing thefertilizer to be deposited upon the top of the furrowand means carried by the boot forcovering the furrow.

In testimony that I claim the foregoing as my own, I have hereto aflixed my signature in the presence of witnesses.

ALVIN M. THREEWITS.

Witnesse Gnon' KRAMER, PAUL A. BECKETT, WVn 'rnR LT. BURGESS. 

